Portion of a shoe midsole



FIG. 1 is a perspective view of a portion of a shoe midsole showing my new design;

FIG. 2 is a lateral side elevational view thereof;

FIG. 3 is a medial side elevational view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a cross-section taken at line 5—5 of FIG. 2.

The uneven broken line immediately adjacent to the shaded area in FIGS. 1-4 represents an unclaimed boundary of the design. The uneven broken line showing of the remainder of the shoe in each figure is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe midsole, as shown and described. 